I agree with the speakers hiding your hands. It definitely would give a false image of live playing. If that's the only on-board speaker option, It would be difficult to switch from the 800 (for me).
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Live: Korg PA4X/Bose L1 Pro 8/Senn 935
Studio: Korg PA4X/Kawai MP7SE/Tascam DP24SD/Sony C80/AGK 214/ATEM Mini Pro switcher/